[PATCH v4 12/24] ASoC: qdsp6: q6asm: Add q6asm driver

srinivas.kandagatla
2018-03-10T02:24:44Z

This patch adds basic support to Q6 ASM (Audio Stream Manager) module on
Q6DSP. ASM supports up to 8 concurrent streams. each stream can be setup
as playback/capture. ASM provides top control functions like
Pause/flush/resume for playback and record. ASM can Create/destroy encoder,
decoder and also provides POPP dynamic services.

This patch adds support to basic features to allow hdmi playback.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
sound/soc/qcom/Kconfig | 4 +
sound/soc/qcom/qdsp6/Makefile | 1 +
sound/soc/qcom/qdsp6/q6asm.c | 230 ++++++++++++++++++++++++++++++++++++++++++
sound/soc/qcom/qdsp6/q6asm.h | 15 +++
4 files changed, 250 insertions(+)
create mode 100644 sound/soc/qcom/qdsp6/q6asm.c
create mode 100644 sound/soc/qcom/qdsp6/q6asm.h

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 5090ffa75648..a07181290624 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -53,12 +53,16 @@ config SND_SOC_QDSP6_AFE
config SND_SOC_QDSP6_ADM
tristate

+config SND_SOC_QDSP6_ASM
+ tristate
+
config SND_SOC_QDSP6
tristate "SoC ALSA audio driver for QDSP6"
depends on QCOM_APR && HAS_DMA
select SND_SOC_QDSP6_COMMON
select SND_SOC_QDSP6_AFE
select SND_SOC_QDSP6_ADM
+ select SND_SOC_QDSP6_ASM
help
To add support for MSM QDSP6 Soc Audio.
This will enable sound soc platform specific
diff --git a/sound/soc/qcom/qdsp6/Makefile b/sound/soc/qcom/qdsp6/Makefile
index 930944425051..eea962315ab3 100644
--- a/sound/soc/qcom/qdsp6/Makefile
+++ b/sound/soc/qcom/qdsp6/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_SND_SOC_QDSP6_COMMON) += q6dsp-common.o
obj-$(CONFIG_SND_SOC_QDSP6_AFE) += q6afe.o
obj-$(CONFIG_SND_SOC_QDSP6_ADM) += q6adm.o
+obj-$(CONFIG_SND_SOC_QDSP6_ASM) += q6asm.o
diff --git a/sound/soc/qcom/qdsp6/q6asm.c b/sound/soc/qcom/qdsp6/q6asm.c
new file mode 100644
index 000000000000..4ed64d32c6b0
--- /dev/null
+++ b/sound/soc/qcom/qdsp6/q6asm.c
@@ -0,0 +1,230 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2011-2017, The Linux Foundation
+// Copyright (c) 2018, Linaro Limited
+
+#include <linux/mutex.h>
+#include <linux/wait.h>
+#include <linux/module.h>
+#include <linux/soc/qcom/apr.h>
+#include <linux/device.h>
+#include <linux/spinlock.h>
+#include <linux/of.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include "q6asm.h"
+#include "q6core.h"
+#include "q6dsp-errno.h"
+#include "q6dsp-common.h"
+
+#define ASM_SYNC_IO_MODE 0x0001
+#define ASM_ASYNC_IO_MODE 0x0002
+#define ASM_TUN_READ_IO_MODE 0x0004 /* tunnel read write mode */
+#define ASM_TUN_WRITE_IO_MODE 0x0008 /* tunnel read write mode */
+
+struct audio_client {
+ int session;
+ q6asm_cb cb;
+ void *priv;
+ uint32_t io_mode;
+ struct apr_device *adev;
+ struct mutex lock;
+ wait_queue_head_t cmd_wait;
+ struct aprv2_ibasic_rsp_result_t result;
+ int perf_mode;
+ int stream_id;
+ struct device *dev;
+};
+
+struct q6asm {
+ struct apr_device *adev;
+ struct device *dev;
+ struct q6core_svc_api_info ainfo;
+ wait_queue_head_t mem_wait;
+ struct platform_device *pcmdev;
+ struct audio_client *session[MAX_SESSIONS + 1];
+ struct platform_device *pdev_dais;
+};
+
+static bool q6asm_is_valid_audio_client(struct audio_client *ac)
+{
+ struct q6asm *a = dev_get_drvdata(ac->dev->parent);
+ int n;
+
+ if (!ac)
+ return false;
+
+ for (n = 1; n <= MAX_SESSIONS; n++) {
+ if (a->session[n] == ac)
+ return true;
+ }
+
+ return false;
+}
+
+/**
+ * q6asm_audio_client_free() - Freee allocated audio client
+ *
+ * @ac: audio client to free
+ */
+void q6asm_audio_client_free(struct audio_client *ac)
+{
+ struct q6asm *a = dev_get_drvdata(ac->dev->parent);
+
+ a->session[ac->session] = NULL;
+ kfree(ac);
+}
+EXPORT_SYMBOL_GPL(q6asm_audio_client_free);
+
+static struct audio_client *q6asm_get_audio_client(struct q6asm *a,
+ int session_id)
+{
+ if ((session_id <= 0) || (session_id > MAX_SESSIONS)) {
+ dev_err(a->dev, "invalid session: %d\n", session_id);
+ return NULL;
+ }
+
+ if (!a->session[session_id]) {
+ dev_err(a->dev, "session not active: %d\n", session_id);
+ return NULL;
+ }
+
+ return a->session[session_id];
+}
+
+static int q6asm_srvc_callback(struct apr_device *adev,
+ struct apr_client_message *data)
+{
+ struct aprv2_ibasic_rsp_result_t *result;
+ struct q6asm *a, *q6asm = dev_get_drvdata(&adev->dev);
+ struct audio_client *ac = NULL;
+ struct audio_port_data *port;
+ uint32_t dir = 0;
+ uint32_t sid = 0;
+
+ result = data->payload;
+ sid = (data->token >> 8) & 0x0F;
+ ac = q6asm_get_audio_client(q6asm, sid);
+ if (!ac) {
+ dev_err(&adev->dev, "Audio Client not active\n");
+ return 0;
+ }
+
+ if (ac->cb)
+ ac->cb(data->opcode, data->token, data->payload, ac->priv);
+
+ return 0;
+}
+
+/**
+ * q6asm_get_session_id() - get session id for audio client
+ *
+ * @ac: audio client pointer
+ *
+ * Return: Will be an session id of the audio client.
+ */
+int q6asm_get_session_id(struct audio_client *c)
+{
+ return c->session;
+}
+EXPORT_SYMBOL_GPL(q6asm_get_session_id);
+
+/**
+ * q6asm_audio_client_alloc() - Allocate a new audio client
+ *
+ * @dev: Pointer to asm child device.
+ * @cb: event callback.
+ * @priv: private data associated with this client.
+ *
+ * Return: Will be an error pointer on error or a valid audio client
+ * on success.
+ */
+struct audio_client *q6asm_audio_client_alloc(struct device *dev, q6asm_cb cb,
+ void *priv, int stream_id,
+ int perf_mode)
+{
+ struct q6asm *a = dev_get_drvdata(dev->parent);
+ struct audio_client *ac;
+
+ if (stream_id + 1 > MAX_SESSIONS)
+ return ERR_PTR(-EINVAL);
+
+ ac = kzalloc(sizeof(*ac), GFP_KERNEL);
+ if (!ac)
+ return ERR_PTR(-ENOMEM);
+
+ a->session[stream_id + 1] = ac;
+ ac->session = stream_id + 1;
+ ac->cb = cb;
+ ac->dev = dev;
+ ac->priv = priv;
+ ac->io_mode = ASM_SYNC_IO_MODE;
+ ac->perf_mode = perf_mode;
+ /* DSP expects stream id from 1 */
+ ac->stream_id = 1;
+ ac->adev = a->adev;
+
+ init_waitqueue_head(&ac->cmd_wait);
+ mutex_init(&ac->lock);
+ spin_lock_init(&ac->buf_lock);
+
+ return ac;
+}
+EXPORT_SYMBOL_GPL(q6asm_audio_client_alloc);
+
+
+static int q6asm_probe(struct apr_device *adev)
+{
+ struct device *dev = &adev->dev;
+ struct device_node *dais_np;
+ struct q6asm *q6asm;
+
+ q6asm = devm_kzalloc(dev, sizeof(*q6asm), GFP_KERNEL);
+ if (!q6asm)
+ return -ENOMEM;
+
+ q6core_get_svc_api_info(adev->svc_id, &q6asm->ainfo);
+
+ q6asm->dev = dev;
+ q6asm->adev = adev;
+ init_waitqueue_head(&q6asm->mem_wait);
+ dev_set_drvdata(dev, q6asm);
+
+ dais_np = of_get_child_by_name(dev->of_node, "dais");
+ if (dais_np) {
+ q6asm->pdev_dais = of_platform_device_create(dais_np,
+ "q6asm-dai", dev);
+ of_node_put(dais_np);
+ }
+
+ return 0;
+}
+
+static int q6asm_remove(struct apr_device *adev)
+{
+ struct q6asm *q6asm = dev_get_drvdata(&adev->dev);
+
+ if (q6asm->pdev_dais)
+ of_platform_device_destroy(&q6asm->pdev_dais->dev, NULL);
+
+ return 0;
+}
+static const struct of_device_id q6asm_device_id[] = {
+ { .compatible = "qcom,q6asm" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, q6asm_device_id);
+
+static struct apr_driver qcom_q6asm_driver = {
+ .probe = q6asm_probe,
+ .remove = q6asm_remove,
+ .callback = q6asm_srvc_callback,
+ .driver = {
+ .name = "qcom-q6asm",
+ .of_match_table = of_match_ptr(q6asm_device_id),
+ },
+};
+
+module_apr_driver(qcom_q6asm_driver);
+MODULE_DESCRIPTION("Q6 Audio Stream Manager driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/qcom/qdsp6/q6asm.h b/sound/soc/qcom/qdsp6/q6asm.h
new file mode 100644
index 000000000000..6a68afc5d8b6
--- /dev/null
+++ b/sound/soc/qcom/qdsp6/q6asm.h
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef __Q6_ASM_H__
+#define __Q6_ASM_H__
+
+#define MAX_SESSIONS 16
+
+typedef void (*q6asm_cb) (uint32_t opcode, uint32_t token,
+ void *payload, void *priv);
+struct audio_client;
+struct audio_client *q6asm_audio_client_alloc(struct device *dev,
+ q6asm_cb cb, void *priv,
+ int session_id, int perf_mode);
+void q6asm_audio_client_free(struct audio_client *ac);
+int q6asm_get_session_id(struct audio_client *ac);
+#endif /* __Q6_ASM_H__ */
--
2.15.1